1、Designation:B 817 08Standard Specification forPowder Metallurgy(PM)Titanium Alloy StructuralComponents1This standard is issued under the fixed designation B 817;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisio
2、n.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers powder metallurgy(PM)struc-tural components fabricated from commercially pure(CP)titanium powder mixed with
3、master alloy powder and elemen-tal powders in appropriate quantity to yield combined materialchemical compositions comparable to ingot metallurgy(I/M)alloys Titanium 6A1-4V and Titanium 6A1-6V-2Sn.1.2 This specification covers the following materials:1.2.1 Two types depending on alloy composition as
4、 detailedin Table 1.1.2.1.1 Type I is comparable to I/M Ti-6A1-4V.1.2.1.2 Type II is comparable to I/M Ti-6A1-6V-2Sn.1.2.2 Two grades of each type that result from the specifictitanium powder used are as follows:1.2.2.1 Grade 1 is made from sponge fines with residuallevels of chlorine and sodium.1.2
5、.2.2 Grade 2 is made from hydride/dehydride(HDH)orother process titanium with significantly lower chlorine andsodium content.1.2.3 Two classes as a function of density(see Table 2)areas follows:1.2.3.1 Class A density ratio is 94%minimum.1.2.3.2 ClassBdensityratiois99%minimum.(WarningCP titanium pow
6、der may be pyrophoric;its usemay involve an explosion hazard.)1.3 The values stated in inch-pound units are to be regardedas the standard.The SI units given in parentheses are forinformation only.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.I
7、t is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in 1.2.3.2.2.Referenced Documents2.1 ASTM Standards:2B 243 Terminology of Pow
8、der MetallurgyB 311 Test Method for Density Determination for PowderMetallurgy(P/M)Materials Containing Less Than TwoPercent PorosityB 328 Test Method for Density,Oil Content,and Intercon-nected Porosity of Sintered Metal Structural Parts andOil-Impregnated Bearings1This specification is under the j
9、urisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee B09.11 on Near Full Density Powder Metallurgy Materials.Current edition approved Nov.1,2008.Published December 2008.Originallyapproved in 1991.Last previous edition approved
10、in 2003 as B 817 03.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical Composition RequirementsEleme
11、ntComposition,Weight%AGrade 1Grade 2Type IType IIType IType IIAluminum5.50/6.755.0/6.05.50/6.755.0/6.0Vanadium3.50/4.505.0/6.03.50/4.505.0/6.0TinN/AB1.5/2.5N/AB1.5/2.5Iron0.40 max0.35/1.00.40 max0.35/1.0CopperN/AB0.35/1.0N/AB0.35/1.0Oxygen,max0.300.300.300.30Hydrogen,max0.0150.0150.0150.015Nitrogen,
12、max0.040.040.040.04Carbon,max0.100.100.100.10Sodium,max0.200.20TBDCTBDCChlorine,max0.200.20TBDCTBDCSilicon,max0.100.100.100.10Residual elementseach,max0.100.100.100.10Residual elementstotal,max0.400.400.400.40TitaniumremainderremainderremainderremainderAFor the purpose of determining conformance wit
13、h this specification,measuredvalues shall be rounded“to the nearest unit”in the last right-hand digit used inexpressing the specification limit,in accordance with the rounding method ofPractice E 29.BNot applicable.CVarious chloride levels may be available between the standard 0.20 max andthe wrough
14、t equivalent of 0.001 max.The acceptable level for specific productapplications shall be agreed upon between the purchaser and supplier andspecified on the purchase order.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700
15、,West Conshohocken,PA 19428-2959,United States.Copyright by ASTM Intl(all rights reserved);Thu Apr 16 13:19:57 EDT 2009Downloaded/printed byLaurentian University pursuant to License Agreement.No further reproductions authorized.E 29 Practice for Using Significant Digits in Test Data toDetermine Conf
16、ormance with Specifications3.Terminology3.1DefinitionsDefinitions of powder metallurgy termscan be found in Terminology B 243.3.2Descriptions of Terms Specific to This StandardAdditional descriptive information is available in the RelatedMaterial section of Volume 02.05 of the Annual Book of ASTMStandards.4.Ordering Information4.1 Orders for components under this specification shallinclude the following information:4.1.1 Dimensions(see Section 9),4.1.2 Chemical composition(see Section 6 and Tabl
